Among a couple of annoying inaccuracies in the article, the actual reason
most growers don’t bother keeping any males around
is that if your female hops plant gets pollinated by my happy girls, your hops harvest will plummet, as the females turn to seed.
Beware of growing male hops on purpose, it's why they aren't suggested to be grown from seed, when you take a rhizome or a cutting, you're cloning the female.
JQ